Among this ruler's reforms was the introduction of a fixed-sum tax system probably copied from the one used by Diocletian, and this ruler was said to have originated the divan ministry system, which for most of his reign was headed by Bozorgmehr. Following the closing of the Athenian Academy, this ruler received many of its philosophers, and his military accomplishments included the sack of Antioch as well as an alliance with the Turks to crush the Hephthalites in 557 C.E. Cultural achievements during this man's reign include the founding of the medical school at Godenshapur, and his son, the second ruler of his name, completed the construction of the Taq Kisra, the traditional palace of this ruler in his capital of Ctesiphon. The successor to Kavad, this man engineered the death of Mazdak and his followers, and his attempts to impose Zoroastrianism on Armenia led to the last of his wars against Byzantium, which ended with his death and succession by Hormizd IV. For ten points, identify this ruler sometimes known as "the Just" or "of 
Among this ruler's reforms was the introduction of a fixed-sum tax system probably copied from the one used by Diocletian, and this ruler was said to have originated the divan ministry system, which for most of his reign was headed by Bozorgmehr. Following the closing of the Athenian Academy, this ruler received many of its philosophers, and his military accomplishments included the sack of Antioch as well as an alliance with the Turks to crush the Hephthalites in 557 C.E. Cultural achievements during this man's reign include the founding of the medical school at Godenshapur, and his son, the second ruler of his name, completed the construction of the Taq Kisra, the traditional palace of this ruler in his capital of Ctesiphon. The successor to Kavad, this man engineered the death of Mazdak and his followers, and his attempts to impose Zoroastrianism on Armenia led to the last of his wars against Byzantium, which ended with his death and succession by Hormizd IV. For ten points, identify this ruler sometimes known as "the Just" or "of the immortal soul," who ruled the Sassanid empire from 531 to 579 C.E.
Among this ruler's reforms was the introduction of a fixed-sum tax system probably copied from the one used by Diocletian, and this ruler was said to have originated the divan ministry system, which for most of his reign was headed by Bozorgmehr.
{Khosrow} I or {Khusrau} I or {Khosrow Anushirvan} or {Khosrow} the Just